Use the given row transformation to change the matrix as indicated.
; 2 times row 1 added to row 2
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Find the exact value of the expression.sin 20° cos 100° + cos 20° sin 100°
A. 
B. 
C. - 
D. - 
Mathematics
For the pair of functions, find the indicated sum, difference, product, or quotient.f(x) = 7x - 9, g(x) = 5x - 2Find (f/g)(x).
A. 
B. 
C. 
D. 
Mathematics
Solve the inequality.
? 0
A. (-?, -11] or [3, ?) B. [-11, 1) or [3, ?) C. [-11, 1) or (1, 3] D. (-?, -11] or (1, 3]
Mathematics
Solve the problem.Suppose that a circular coin has a circumference of C, a radius of r, and a diameter of d. Write C as a function of d.
A. C = 2?d
B. C = ?d
C. C = ?d2
D. C = 
Mathematics